Martin Kolk
@martinkolk.bsky.social
850 followers 240 following 110 posts
Demographer at Stockholm University and the Institute for Future Studies. https://www.su.se/profiles/mkolk
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martinkolk.bsky.social
However, the widespread agreement to link childbearing with environmental concerns could influence societal norms, and future policy debates on reproduction and sustainability.
martinkolk.bsky.social
We conclude that while environmental concerns are shaping how people think about population and childbearing, these attitudes haven't yet led to widespread changes in family size and fertility preferences in Sweden.
martinkolk.bsky.social
People with greater climate worry and propensity for climate action are more likely to be worried about the future of a child living in a deteriorating world, than that an additional child may contribute negatively towards such a future. We find weak correlations with political attitudes and trust.
martinkolk.bsky.social
Different eco-reproductive concerns are moderately correlated with each other, and relatively weakly correlated with whether people have children or not. We find that the same people largely support policies reducing population both in their own country, and in developing countries.
martinkolk.bsky.social
People generally agreed both factors are important.While 65-70% of respondents said in principle that environmental problems should factor into childbearing decisions, fewer went as far as saying that individuals should limit the sizes of their families for environmental reasons.
martinkolk.bsky.social
In a second study, with over 600 participants, we asked how much environmental factors should influence childbearing decisions - both the possible impact of a worsening environment on the child, and that an additional child may contribute to an increasing population that may worsen the environment.
martinkolk.bsky.social
We find that younger people and women are more worried about climate change, while men are more concerned about overpopulation. Parents with more children tend to be more concerned about future generations but less worried about overpopulation.
martinkolk.bsky.social
Our first data set is 8,000 respondents in the Swedish Gender and Generation Survey. Respondents were asked about worries such as climate change, overpopulation, and the prospects of future generations. Worries about three things are widespread.
martinkolk.bsky.social
The study focuses on eco-reproductive concerns—the idea that environmental challenges should influence personal and societal views on childbearing.
martinkolk.bsky.social
We do not find that individual decisions about having children are clearly shaped by environmental concerns, but many people believe such concerns should play a role in reproductive choices.
martinkolk.bsky.social
In our new study in Population and Environment, we examine how environmental concerns shape public attitudes toward childbearing in Sweden. We find views linking environmental concerns with reproduction are widespread, even if we find less support that they affect behavior.

doi.org/10.1007/s111...
martinkolk.bsky.social
Much of the increasing gender gap is compositional, with increasing shares of migrants with larger gender gaps, increasing the employment gap in the population.

Among Swedish men and women, employment has decreased, but much less.

Different time series 2005-2024 (with different age categories)
martinkolk.bsky.social
And here is the same figure for age 16-64. Essentially the same pattern, though more dramatic decline in employment (due to more enrolled students at younger ages).
martinkolk.bsky.social
Sweden reached near gender parity in employment in the late 1980s, and if anything, the gender gap has increased since then.

There used to be near-universal employment among Swedish men, with Swedish women nearly catching up in the 1980s.

Swedish labor force survey, age 35-44.
martinkolk.bsky.social
I dag publicerades min artikel på DN Debatt där jag argumenterar för en höjning, och beskattning av barnbidraget, baserat på att vi ser ökade socioekonomiska skillnader i föräldraskap.

www.dn.se/debatt/hoj-b...
DN Debatt. ”Höj barnbidraget – unga familjer måste prioriteras”
DN Debatt. I takt med att barnafödandet minskar bör barnbidraget höjas och göras skattepliktigt, skriver Martin Kolk, docent i demografi.
www.dn.se
martinkolk.bsky.social
Take away: Using register data to study religion allows novel research with longitudinal designs.

Register data reveal that wedding linked conversions sustain high endogamy even in secular societies.

Full open access preprint at:

doi.org/10.17045/sth...
martinkolk.bsky.social
However, women are not consistently more endogamous, nor are they always less likely to switch. Patterns depend on the strictness and size of the denomination.
martinkolk.bsky.social
Gender matters, but not uniformly. In endogamous unions created by conversion, wives more often adopt the husband’s faith — especially in Islam and Judaism. For Lutherans, it is husbands who usually join the wife’s religion.
martinkolk.bsky.social
Total effect: by age 45, conversions add ≥ 20 percentage points to endogamy for most minorities, but subtract ~8 points for Lutherans. Marriage is a powerful catalyst for religious mobility.
martinkolk.bsky.social
When do switches happen? For every group except Lutherans, conversions spike in the two year band around the wedding, driving sharp jumps in homogamy. Among Lutherans, secularisation means conversions reduce endogamy over the life course.
martinkolk.bsky.social
Once we control for group size, odds of marrying inside one’s faith explode for stricter or migrant dense groups: 50 to 1 000 fold higher than random matching for Other Protestants, Other Christians, Islam and Judaism, reflecting strong endogamy.
martinkolk.bsky.social
Endogamy at the wedding is high in the majority church (≈ 81 % of Lutherans marry another Lutheran) but far lower for minority groups (≈ 40 % among the unaffiliated, ≈ 15 % among Orthodox).

However, this is largely due to the relative size of the different groups.